Question

37. A circle has a diameter of 5.2 cm. Write its
circumference in significant figures
38. The diameter of a sphere is 4.24 cm. Compute its
surface area up to appropriate significant figures
(π=3.142)
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Answer 1

Answer:

Use the formula C/2π. Since the circumference is equal to πD, which is equal to 2πr, dividing the circumference by 2π will give the radius. If you have a sphere with a circumference of 20 m, find the radius by dividing 20/2π = 3.183 m. Use the same formula to convert between the radius and circumference of a circle

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